Our Blog - See Examples of Spindles We've Repaired

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Welcome to our blog. Here, you'll find examples of spindles we've repaired in the past. We explain what was wrong, have images, videos and more. If you're looking for more specific brand information, or can't find a brand click here, or try the "brands" link above.

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    • Milltronics VM17 Spindle Rebuild

    Milltronics VM17

    Milltronics VM17 Spindle Repair

    This is a spindle made by Setco for a Milltronics machine. The #3 bearing of the front tri-set failed. The manufacturer or the previous rebuilder did not set the spacers correctly for the front bearing set. They had the spacers set for a much heavier preload than the speed of the spindle would allow. This caused heat and premature bearing wear that eventually lead to the failure of the spindle assembly. The taper also had 8 microns of run out.

    Northland Tool kiss ground the taper and reworked the spacers to give the front tri-set of bearings the proper preload. We assembled the spindle and test ran it on our test stand at the top operational speed of 8000 rpm. 

    Categories: Automotive Industry,CNC Machining Industry,CNC Spindles,Milltronics Spindle Repair,Setco Spindles

    Sandy @ 11:33 am


    Jager KS3-20/60 Spindle Repair

    Jager KS3-20/60 Spindle Repair

    60,000 rpm
    The rear bearing seized in this Jager spindle causing damage to the spindle housing. The front housing bore was also over sized. Northland Tool ground plate ground both housing bores to bring them back to the proper fits for the bearings. We also rebuilt the tool change system bringing the tool retention force back to specification.
    Categories: Automotive Industry,Jager Spindles

    Sandy @ 12:18 pm


    Mori Seiki SH40Mori Seiki SH40

    The taper of this spindle had build up causing tool run out. The front bearings were contaminated and the front housing was over sized. All these factors contributed to bad part finish that eventually lead to our customer to send the spindle to Northland Tool for repair.

    We ground plate ground the front housing and the 40 taper in our grinding department. The spindle was then assemble in our clean room. The final quality test showed less than 2 microns repeatable run out on a 12 inch test bar over multiple tool changes. This was exactly what our customer needed for his process. View Our Mori Seiki Spindle Repair Page Here.

    If you would like more information please call us at 800-774-6353 or CLICK HERE.

    Categories: Automotive Industry,CNC Machining Industry,CNC Spindles,Milling Spindles,Mori Seiki Spindles

    Sandy @ 1:07 pm


    OKK HM40
    OKK HM40

    OKK HM40

    Conversion from ceramic to steel
    One of our long time customers had this spindle fail recently. They use the spindle to rough out parts and are only running it at a fraction of its top rated speed. We discussed the repair with them and decided that replacing the ceramic bearings with steel would not only save them money but would increase the spindles lifespan in the machine. The steel balls in the bearings are less likely than their ceramic counterparts to brinell the raceways during high load situations.
    Categories: Automotive Industry,CNC Spindles,Milling Spindles,OKK Spindles,Problem Solving Case Studies

    Sandy @ 12:28 pm


    Mazak H630
    Mazak H630

    Mazak H630

    This spindle was exchanged with the OEM the last time it failed. Our customer came to us because it failed prematurely and the OEM would not cover the repair under warranty.

    When we received the spindle and evaluated it we determined that when the spindle was exchanged the new spindle they installed had air purge capabilities. Their machine did not have this option and the OEM did not plug the air input hole. This gave coolant a direct path to the bearings and led to the spindle failure.  We placed a removable plug in the air purge and gave instructions to our customer for the installation of an air purge system.

    Categories: Automotive Industry,Mazak Spindles,Milling Spindles,Problem Solving Case Studies

    Sandy @ 10:09 am


    GTI HNA75
    GTI HNA75

    GTI HNA75

    Gamfior ID grinding spindle
    This is a 75,000 rpm ID grinding spindle manufactured by Gamfior and relabled by GTI Spindle. Our incomming evaluation showed bearing wear and an oversized pilot. We ground plate ground the pilot and assembled the spindle in our clean room. It was then test run at 75,000 rpm and it passed our final QC requirements.
    Categories: Automotive Industry,Gamfior Spindles,Grinding Spindles,GTI Spindles,Integrated Suppliers

    Sandy @ 11:35 am


    Toyo HFB03
    Toyo HFB03

    Toyo HFB03

    30,000 rpm
    This spindle was crashed causing the bearings to brinell. This spindle was critical to our customers process and they called us for an immediate turn around. We were able evaluate the spindle the day it was delivered. Our technician worked overnight assembling the spindle. The parts that were needed were pulled from our large stock of bearings and spindle parts inventory. Our customer was able to pick this spindle up at 6:00 am the next day. We saved our customer valuable production time and most likley retained their customer for them.  
    Categories: Automotive Industry,Emergency Repair,Grinding Spindles,Problem Solving Case Studies,Toyo Spindles

    Sandy @ 11:55 am


    Takamaz Spindle
    Takamaz Spindle

    Takamaz Spindle

    1800 rpm
    OD Taper tooling
    Our customer was having issues with the repair quality and longevity of the repairs from their previous vendor. We evaluated the spindles and found that many of the critical bearing surfaces were far out of ISO specifications. It appeared that the previous rebuilder was only changing bearings during the repair and not completely evaluating the spindles for causes of failure. Once we rebuild the spindles to the proper specifications they continue to run several years later on our single repair.
    Categories: Automotive Industry,Grinding Spindles,Takamaz Spindles

    Sandy @ 2:15 pm


    OKK HP 5005
    OKK HP 5005

    OKK HP 5005

    The owners of this spindle started to repair the spindle by himself and quickly abandoned that thought as it did not go smoothly for them. We needed to re-qualify a few areas of the shaft and housing caused by improper dis-assembly techniques. We were able to salvage the spindle and within 5 days our customer was up and running. They have determined that Northland Tool & Electronics will be their rebuilder for any spindles in the future.

    Categories: Automotive Industry,Milling Spindles,OKK Spindles

    Sandy @ 11:54 am


    Okuma HF 802
    Okuma HF 802

    Okuma HF 802

    80,000 rpm
    Oil mist lubricated
    Northland Tool & Electronics has the housings to run this type of Okuma. We can duplicate the way it is run in the machine.
    High speed ID grinding spindles are subjected to many factors that decrease their lifespan. Speed, contamination, overloading and crashes to name a few. We can work with you to give you a better understanding of these factors and what you can and can not control.
    Categories: Automotive Industry,Grinding Spindles,Okuma Spindles

    Sandy @ 12:37 pm


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